Patent US3356622A successfully refreshed from Google Patents.
US3356622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foam produced from hydroxyalkylated substantially petroleum hydrocarbon-insoluble pine wood resin
Assignee: Hercules LLC
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Filing: 1963-12-31
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Granted: 1967-12-05
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Expires: 1983-12-31
Abstract
No abstract record available.
Inventors
- 👤 David W Delmonte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:42
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6492; C08G18/4009; C08G18/4081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
THE METHOD OF PREPARING A POLYURETHANE FOAM WHICH COMPRISES REACTING AT A TEMPERATURE FROM ABOUT 25*C. TO ABOUT 100*C. A MIXTURE OF (1) A BLEND OF (A) A POLYOL OF THE GROUP CONSISTING OF POLYESTERS AND POLYETHERS HAVING AT LEAST TWO HYDROXYL GROUPS PER MOLECULE AND (B) A HYDROXYALKYLATED SUBSTANTIALLY PETROLEUM HYDROCARBONINSOLUBLE PINE WOOD RESIN IN WHICH THE HYDROXYALKYL GROUP IS SELECTED FROM THE GROUP CONSISTING OF HYDROXYETHYL AND HYDROXYPROPYL, SAID BLEND HAVING A HYDROXYL NUMBER IN THE RANGE OF 40-650, (2) AN ORGANIC POLYISOCYANATE IN AMOUNT SUCH THAT ABOUT 0.7 TO 1.1 ISOCYANATO GROUPS ARE AVAILABLE PER REACTIVE HYDROGEN IN SAID MIXTURE, AND (3) A BLOWING AGENT.
Claim 2
Independent Claim
108 words
THE METHOD OF PREPARING A POLYURETHANE FOAM WHICH COMPRISES REACTING AT A TEMPERATURE FROM ABOUT 25*C. TO ABOUT 100*C. A MIXTURE OF (1) A BLEND OF (A) A POLYOL OF THE GROUP CONSISTING OF POLYESTERS AND POLYETHERS HAVING AT LEAST TWO HYDROXYL GROUPS PER MOLECULE AND (B) A HYDROXYALKYLATED SUBSTANTIALLY PETROLEUM HYDROCARBONINSOLUBLE PINE WOOD RESIN IN WHICH THE HYDROXYALKYL GROUP IS SELECTED FROM THE GROUP CONSISTING OF HYDROXYETHYL AND HYDROXYPROPYL, SAID BLEND HAVING A HYDROXYL NUMBER IN THE RANGE OF 40-650, (2) AN ORGANIC POLYISOCYANATE IN AMOUNT SUCH THAT ABOUT 0.7 TO 1.1 ISOCYANATO GROUPS ARE AVAILABLE PER REACTIVE HYDROGEN IN SAID MIXTURE, AND (3) A BLOWING AGENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |